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高能理论论坛 (HETH-Forum)

Pulsar Polarization Array - A New Methodology for Astroparticle Physics

by Tao Liu (The Hong Kong University of Science and Technology)




报告摘要:Pulsars are known to be extraordinary astronomical clocks and linear polarizers. As astronomical clocks, the millisecond pulsars can be used to form a galaxy-scale interferometer, known as a Pulsar Timing Array (PTA) since 1980's, to detect nano-Hertz gravitational waves. Recently, it was also proposed to construct a Pulsar Polarization Array (PPA) to explore new phenomena in astrophysics and fundamental physics with a common correlated polarization signal at galaxy scale, based on the readily available polarization data accumulated over decades. In this talk, the speaker will give an introduction to this new experimental methodology, and as one scientific case, demonstrate its strong capability to detect ultralight axion-like wave dark matter (one of the mainstream dark matter candidates). The speaker will also discuss the potential synergization of PPA and PTA or correlation between pulsar polarization and timing signatures for relevant scientific tasks.

个人简介:刘滔博士的研究方向为粒子物理学以及与天文学和宇宙学的交叉。刘滔博士于2007年在宾夕法尼亚大学获得物理学博士学位。随后三年在芝加哥大学恩里科-费米研究所担任``McCormick Fellow''。2010年,他前往加州大学圣塔芭芭拉分校继续博士后研究。刘滔博士于2013年加入香港科技大学担任助理教授。现为香港科技大学副教授。刘滔博士曾于2016年荣获香港科技大学理学院「科学研究奖」。 现为香港教资会/研究资助局合作研究基金项目「Dark Matter and the Universe」主持人。